But mu power button still works, I can press it and it will shut down, I don't hve to hold it in for 5s. Ctrl-alt-bksp or ctroil-alt-del don't work, so I don't know if the power button activates some bios command, or my acpid files.

Well. This is not Xorg-7.5 related - I just tested suspend-resume with Xvesa and although dmesg looks different, it also seems to crash the GPU. I don't know how I got a different result last time - with the transition to 3.x, I must have gotten confused about which kernel was involved.

So the bottom line is, suspend-resume no longer works with 2.6.33.3-tinycore. This stuff could be moved to its own kernel bug thread, I suppose?

But not only intel produces bugs here with the new KMS.When starting Xorg for the first time you will only get a KMS vt, but no fully functional X session. So, you either have to kill and restart Xorg, or "modprobe radeon modeset=1" manually at the top of .xinitrc.